1 /* 2 * Security plug functions 3 * 4 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> 7 * Copyright (C) 2016 Mellanox Technologies 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 */ 14 15 #include <linux/bpf.h> 16 #include <linux/capability.h> 17 #include <linux/dcache.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/kernel.h> 21 #include <linux/lsm_hooks.h> 22 #include <linux/integrity.h> 23 #include <linux/ima.h> 24 #include <linux/evm.h> 25 #include <linux/fsnotify.h> 26 #include <linux/mman.h> 27 #include <linux/mount.h> 28 #include <linux/personality.h> 29 #include <linux/backing-dev.h> 30 #include <linux/string.h> 31 #include <net/flow.h> 32 33 #define MAX_LSM_EVM_XATTR 2 34 35 /* Maximum number of letters for an LSM name string */ 36 #define SECURITY_NAME_MAX 10 37 38 struct security_hook_heads security_hook_heads __lsm_ro_after_init; 39 static ATOMIC_NOTIFIER_HEAD(lsm_notifier_chain); 40 41 char *lsm_names; 42 /* Boot-time LSM user choice */ 43 static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = 44 CONFIG_DEFAULT_SECURITY; 45 46 static void __init major_lsm_init(void) 47 { 48 struct lsm_info *lsm; 49 50 for (lsm = __start_lsm_info; lsm < __end_lsm_info; lsm++) { 51 lsm->init(); 52 } 53 } 54 55 /** 56 * security_init - initializes the security framework 57 * 58 * This should be called early in the kernel initialization sequence. 59 */ 60 int __init security_init(void) 61 { 62 int i; 63 struct hlist_head *list = (struct hlist_head *) &security_hook_heads; 64 65 pr_info("Security Framework initializing\n"); 66 67 for (i = 0; i < sizeof(security_hook_heads) / sizeof(struct hlist_head); 68 i++) 69 INIT_HLIST_HEAD(&list[i]); 70 71 /* 72 * Load minor LSMs, with the capability module always first. 73 */ 74 capability_add_hooks(); 75 yama_add_hooks(); 76 loadpin_add_hooks(); 77 78 /* 79 * Load all the remaining security modules. 80 */ 81 major_lsm_init(); 82 83 return 0; 84 } 85 86 /* Save user chosen LSM */ 87 static int __init choose_lsm(char *str) 88 { 89 strncpy(chosen_lsm, str, SECURITY_NAME_MAX); 90 return 1; 91 } 92 __setup("security=", choose_lsm); 93 94 static bool match_last_lsm(const char *list, const char *lsm) 95 { 96 const char *last; 97 98 if (WARN_ON(!list || !lsm)) 99 return false; 100 last = strrchr(list, ','); 101 if (last) 102 /* Pass the comma, strcmp() will check for '\0' */ 103 last++; 104 else 105 last = list; 106 return !strcmp(last, lsm); 107 } 108 109 static int lsm_append(char *new, char **result) 110 { 111 char *cp; 112 113 if (*result == NULL) { 114 *result = kstrdup(new, GFP_KERNEL); 115 if (*result == NULL) 116 return -ENOMEM; 117 } else { 118 /* Check if it is the last registered name */ 119 if (match_last_lsm(*result, new)) 120 return 0; 121 cp = kasprintf(GFP_KERNEL, "%s,%s", *result, new); 122 if (cp == NULL) 123 return -ENOMEM; 124 kfree(*result); 125 *result = cp; 126 } 127 return 0; 128 } 129 130 /** 131 * security_module_enable - Load given security module on boot ? 132 * @module: the name of the module 133 * 134 * Each LSM must pass this method before registering its own operations 135 * to avoid security registration races. This method may also be used 136 * to check if your LSM is currently loaded during kernel initialization. 137 * 138 * Returns: 139 * 140 * true if: 141 * 142 * - The passed LSM is the one chosen by user at boot time, 143 * - or the passed LSM is configured as the default and the user did not 144 * choose an alternate LSM at boot time. 145 * 146 * Otherwise, return false. 147 */ 148 int __init security_module_enable(const char *module) 149 { 150 return !strcmp(module, chosen_lsm); 151 } 152 153 /** 154 * security_add_hooks - Add a modules hooks to the hook lists. 155 * @hooks: the hooks to add 156 * @count: the number of hooks to add 157 * @lsm: the name of the security module 158 * 159 * Each LSM has to register its hooks with the infrastructure. 160 */ 161 void __init security_add_hooks(struct security_hook_list *hooks, int count, 162 char *lsm) 163 { 164 int i; 165 166 for (i = 0; i < count; i++) { 167 hooks[i].lsm = lsm; 168 hlist_add_tail_rcu(&hooks[i].list, hooks[i].head); 169 } 170 if (lsm_append(lsm, &lsm_names) < 0) 171 panic("%s - Cannot get early memory.\n", __func__); 172 } 173 174 int call_lsm_notifier(enum lsm_event event, void *data) 175 { 176 return atomic_notifier_call_chain(&lsm_notifier_chain, event, data); 177 } 178 EXPORT_SYMBOL(call_lsm_notifier); 179 180 int register_lsm_notifier(struct notifier_block *nb) 181 { 182 return atomic_notifier_chain_register(&lsm_notifier_chain, nb); 183 } 184 EXPORT_SYMBOL(register_lsm_notifier); 185 186 int unregister_lsm_notifier(struct notifier_block *nb) 187 { 188 return atomic_notifier_chain_unregister(&lsm_notifier_chain, nb); 189 } 190 EXPORT_SYMBOL(unregister_lsm_notifier); 191 192 /* 193 * Hook list operation macros. 194 * 195 * call_void_hook: 196 * This is a hook that does not return a value. 197 * 198 * call_int_hook: 199 * This is a hook that returns a value. 200 */ 201 202 #define call_void_hook(FUNC, ...) \ 203 do { \ 204 struct security_hook_list *P; \ 205 \ 206 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) \ 207 P->hook.FUNC(__VA_ARGS__); \ 208 } while (0) 209 210 #define call_int_hook(FUNC, IRC, ...) ({ \ 211 int RC = IRC; \ 212 do { \ 213 struct security_hook_list *P; \ 214 \ 215 hlist_for_each_entry(P, &security_hook_heads.FUNC, list) { \ 216 RC = P->hook.FUNC(__VA_ARGS__); \ 217 if (RC != 0) \ 218 break; \ 219 } \ 220 } while (0); \ 221 RC; \ 222 }) 223 224 /* Security operations */ 225 226 int security_binder_set_context_mgr(struct task_struct *mgr) 227 { 228 return call_int_hook(binder_set_context_mgr, 0, mgr); 229 } 230 231 int security_binder_transaction(struct task_struct *from, 232 struct task_struct *to) 233 { 234 return call_int_hook(binder_transaction, 0, from, to); 235 } 236 237 int security_binder_transfer_binder(struct task_struct *from, 238 struct task_struct *to) 239 { 240 return call_int_hook(binder_transfer_binder, 0, from, to); 241 } 242 243 int security_binder_transfer_file(struct task_struct *from, 244 struct task_struct *to, struct file *file) 245 { 246 return call_int_hook(binder_transfer_file, 0, from, to, file); 247 } 248 249 int security_ptrace_access_check(struct task_struct *child, unsigned int mode) 250 { 251 return call_int_hook(ptrace_access_check, 0, child, mode); 252 } 253 254 int security_ptrace_traceme(struct task_struct *parent) 255 { 256 return call_int_hook(ptrace_traceme, 0, parent); 257 } 258 259 int security_capget(struct task_struct *target, 260 kernel_cap_t *effective, 261 kernel_cap_t *inheritable, 262 kernel_cap_t *permitted) 263 { 264 return call_int_hook(capget, 0, target, 265 effective, inheritable, permitted); 266 } 267 268 int security_capset(struct cred *new, const struct cred *old, 269 const kernel_cap_t *effective, 270 const kernel_cap_t *inheritable, 271 const kernel_cap_t *permitted) 272 { 273 return call_int_hook(capset, 0, new, old, 274 effective, inheritable, permitted); 275 } 276 277 int security_capable(const struct cred *cred, struct user_namespace *ns, 278 int cap) 279 { 280 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_AUDIT); 281 } 282 283 int security_capable_noaudit(const struct cred *cred, struct user_namespace *ns, 284 int cap) 285 { 286 return call_int_hook(capable, 0, cred, ns, cap, SECURITY_CAP_NOAUDIT); 287 } 288 289 int security_quotactl(int cmds, int type, int id, struct super_block *sb) 290 { 291 return call_int_hook(quotactl, 0, cmds, type, id, sb); 292 } 293 294 int security_quota_on(struct dentry *dentry) 295 { 296 return call_int_hook(quota_on, 0, dentry); 297 } 298 299 int security_syslog(int type) 300 { 301 return call_int_hook(syslog, 0, type); 302 } 303 304 int security_settime64(const struct timespec64 *ts, const struct timezone *tz) 305 { 306 return call_int_hook(settime, 0, ts, tz); 307 } 308 309 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) 310 { 311 struct security_hook_list *hp; 312 int cap_sys_admin = 1; 313 int rc; 314 315 /* 316 * The module will respond with a positive value if 317 * it thinks the __vm_enough_memory() call should be 318 * made with the cap_sys_admin set. If all of the modules 319 * agree that it should be set it will. If any module 320 * thinks it should not be set it won't. 321 */ 322 hlist_for_each_entry(hp, &security_hook_heads.vm_enough_memory, list) { 323 rc = hp->hook.vm_enough_memory(mm, pages); 324 if (rc <= 0) { 325 cap_sys_admin = 0; 326 break; 327 } 328 } 329 return __vm_enough_memory(mm, pages, cap_sys_admin); 330 } 331 332 int security_bprm_set_creds(struct linux_binprm *bprm) 333 { 334 return call_int_hook(bprm_set_creds, 0, bprm); 335 } 336 337 int security_bprm_check(struct linux_binprm *bprm) 338 { 339 int ret; 340 341 ret = call_int_hook(bprm_check_security, 0, bprm); 342 if (ret) 343 return ret; 344 return ima_bprm_check(bprm); 345 } 346 347 void security_bprm_committing_creds(struct linux_binprm *bprm) 348 { 349 call_void_hook(bprm_committing_creds, bprm); 350 } 351 352 void security_bprm_committed_creds(struct linux_binprm *bprm) 353 { 354 call_void_hook(bprm_committed_creds, bprm); 355 } 356 357 int security_sb_alloc(struct super_block *sb) 358 { 359 return call_int_hook(sb_alloc_security, 0, sb); 360 } 361 362 void security_sb_free(struct super_block *sb) 363 { 364 call_void_hook(sb_free_security, sb); 365 } 366 367 int security_sb_copy_data(char *orig, char *copy) 368 { 369 return call_int_hook(sb_copy_data, 0, orig, copy); 370 } 371 EXPORT_SYMBOL(security_sb_copy_data); 372 373 int security_sb_remount(struct super_block *sb, void *data) 374 { 375 return call_int_hook(sb_remount, 0, sb, data); 376 } 377 378 int security_sb_kern_mount(struct super_block *sb, int flags, void *data) 379 { 380 return call_int_hook(sb_kern_mount, 0, sb, flags, data); 381 } 382 383 int security_sb_show_options(struct seq_file *m, struct super_block *sb) 384 { 385 return call_int_hook(sb_show_options, 0, m, sb); 386 } 387 388 int security_sb_statfs(struct dentry *dentry) 389 { 390 return call_int_hook(sb_statfs, 0, dentry); 391 } 392 393 int security_sb_mount(const char *dev_name, const struct path *path, 394 const char *type, unsigned long flags, void *data) 395 { 396 return call_int_hook(sb_mount, 0, dev_name, path, type, flags, data); 397 } 398 399 int security_sb_umount(struct vfsmount *mnt, int flags) 400 { 401 return call_int_hook(sb_umount, 0, mnt, flags); 402 } 403 404 int security_sb_pivotroot(const struct path *old_path, const struct path *new_path) 405 { 406 return call_int_hook(sb_pivotroot, 0, old_path, new_path); 407 } 408 409 int security_sb_set_mnt_opts(struct super_block *sb, 410 struct security_mnt_opts *opts, 411 unsigned long kern_flags, 412 unsigned long *set_kern_flags) 413 { 414 return call_int_hook(sb_set_mnt_opts, 415 opts->num_mnt_opts ? -EOPNOTSUPP : 0, sb, 416 opts, kern_flags, set_kern_flags); 417 } 418 EXPORT_SYMBOL(security_sb_set_mnt_opts); 419 420 int security_sb_clone_mnt_opts(const struct super_block *oldsb, 421 struct super_block *newsb, 422 unsigned long kern_flags, 423 unsigned long *set_kern_flags) 424 { 425 return call_int_hook(sb_clone_mnt_opts, 0, oldsb, newsb, 426 kern_flags, set_kern_flags); 427 } 428 EXPORT_SYMBOL(security_sb_clone_mnt_opts); 429 430 int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) 431 { 432 return call_int_hook(sb_parse_opts_str, 0, options, opts); 433 } 434 EXPORT_SYMBOL(security_sb_parse_opts_str); 435 436 int security_inode_alloc(struct inode *inode) 437 { 438 inode->i_security = NULL; 439 return call_int_hook(inode_alloc_security, 0, inode); 440 } 441 442 void security_inode_free(struct inode *inode) 443 { 444 integrity_inode_free(inode); 445 call_void_hook(inode_free_security, inode); 446 } 447 448 int security_dentry_init_security(struct dentry *dentry, int mode, 449 const struct qstr *name, void **ctx, 450 u32 *ctxlen) 451 { 452 return call_int_hook(dentry_init_security, -EOPNOTSUPP, dentry, mode, 453 name, ctx, ctxlen); 454 } 455 EXPORT_SYMBOL(security_dentry_init_security); 456 457 int security_dentry_create_files_as(struct dentry *dentry, int mode, 458 struct qstr *name, 459 const struct cred *old, struct cred *new) 460 { 461 return call_int_hook(dentry_create_files_as, 0, dentry, mode, 462 name, old, new); 463 } 464 EXPORT_SYMBOL(security_dentry_create_files_as); 465 466 int security_inode_init_security(struct inode *inode, struct inode *dir, 467 const struct qstr *qstr, 468 const initxattrs initxattrs, void *fs_data) 469 { 470 struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; 471 struct xattr *lsm_xattr, *evm_xattr, *xattr; 472 int ret; 473 474 if (unlikely(IS_PRIVATE(inode))) 475 return 0; 476 477 if (!initxattrs) 478 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, 479 dir, qstr, NULL, NULL, NULL); 480 memset(new_xattrs, 0, sizeof(new_xattrs)); 481 lsm_xattr = new_xattrs; 482 ret = call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, qstr, 483 &lsm_xattr->name, 484 &lsm_xattr->value, 485 &lsm_xattr->value_len); 486 if (ret) 487 goto out; 488 489 evm_xattr = lsm_xattr + 1; 490 ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); 491 if (ret) 492 goto out; 493 ret = initxattrs(inode, new_xattrs, fs_data); 494 out: 495 for (xattr = new_xattrs; xattr->value != NULL; xattr++) 496 kfree(xattr->value); 497 return (ret == -EOPNOTSUPP) ? 0 : ret; 498 } 499 EXPORT_SYMBOL(security_inode_init_security); 500 501 int security_old_inode_init_security(struct inode *inode, struct inode *dir, 502 const struct qstr *qstr, const char **name, 503 void **value, size_t *len) 504 { 505 if (unlikely(IS_PRIVATE(inode))) 506 return -EOPNOTSUPP; 507 return call_int_hook(inode_init_security, -EOPNOTSUPP, inode, dir, 508 qstr, name, value, len); 509 } 510 EXPORT_SYMBOL(security_old_inode_init_security); 511 512 #ifdef CONFIG_SECURITY_PATH 513 int security_path_mknod(const struct path *dir, struct dentry *dentry, umode_t mode, 514 unsigned int dev) 515 { 516 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 517 return 0; 518 return call_int_hook(path_mknod, 0, dir, dentry, mode, dev); 519 } 520 EXPORT_SYMBOL(security_path_mknod); 521 522 int security_path_mkdir(const struct path *dir, struct dentry *dentry, umode_t mode) 523 { 524 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 525 return 0; 526 return call_int_hook(path_mkdir, 0, dir, dentry, mode); 527 } 528 EXPORT_SYMBOL(security_path_mkdir); 529 530 int security_path_rmdir(const struct path *dir, struct dentry *dentry) 531 { 532 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 533 return 0; 534 return call_int_hook(path_rmdir, 0, dir, dentry); 535 } 536 537 int security_path_unlink(const struct path *dir, struct dentry *dentry) 538 { 539 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 540 return 0; 541 return call_int_hook(path_unlink, 0, dir, dentry); 542 } 543 EXPORT_SYMBOL(security_path_unlink); 544 545 int security_path_symlink(const struct path *dir, struct dentry *dentry, 546 const char *old_name) 547 { 548 if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry)))) 549 return 0; 550 return call_int_hook(path_symlink, 0, dir, dentry, old_name); 551 } 552 553 int security_path_link(struct dentry *old_dentry, const struct path *new_dir, 554 struct dentry *new_dentry) 555 { 556 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 557 return 0; 558 return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry); 559 } 560 561 int security_path_rename(const struct path *old_dir, struct dentry *old_dentry, 562 const struct path *new_dir, struct dentry *new_dentry, 563 unsigned int flags) 564 { 565 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 566 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 567 return 0; 568 569 if (flags & RENAME_EXCHANGE) { 570 int err = call_int_hook(path_rename, 0, new_dir, new_dentry, 571 old_dir, old_dentry); 572 if (err) 573 return err; 574 } 575 576 return call_int_hook(path_rename, 0, old_dir, old_dentry, new_dir, 577 new_dentry); 578 } 579 EXPORT_SYMBOL(security_path_rename); 580 581 int security_path_truncate(const struct path *path) 582 { 583 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 584 return 0; 585 return call_int_hook(path_truncate, 0, path); 586 } 587 588 int security_path_chmod(const struct path *path, umode_t mode) 589 { 590 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 591 return 0; 592 return call_int_hook(path_chmod, 0, path, mode); 593 } 594 595 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid) 596 { 597 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 598 return 0; 599 return call_int_hook(path_chown, 0, path, uid, gid); 600 } 601 602 int security_path_chroot(const struct path *path) 603 { 604 return call_int_hook(path_chroot, 0, path); 605 } 606 #endif 607 608 int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode) 609 { 610 if (unlikely(IS_PRIVATE(dir))) 611 return 0; 612 return call_int_hook(inode_create, 0, dir, dentry, mode); 613 } 614 EXPORT_SYMBOL_GPL(security_inode_create); 615 616 int security_inode_link(struct dentry *old_dentry, struct inode *dir, 617 struct dentry *new_dentry) 618 { 619 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)))) 620 return 0; 621 return call_int_hook(inode_link, 0, old_dentry, dir, new_dentry); 622 } 623 624 int security_inode_unlink(struct inode *dir, struct dentry *dentry) 625 { 626 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 627 return 0; 628 return call_int_hook(inode_unlink, 0, dir, dentry); 629 } 630 631 int security_inode_symlink(struct inode *dir, struct dentry *dentry, 632 const char *old_name) 633 { 634 if (unlikely(IS_PRIVATE(dir))) 635 return 0; 636 return call_int_hook(inode_symlink, 0, dir, dentry, old_name); 637 } 638 639 int security_inode_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) 640 { 641 if (unlikely(IS_PRIVATE(dir))) 642 return 0; 643 return call_int_hook(inode_mkdir, 0, dir, dentry, mode); 644 } 645 EXPORT_SYMBOL_GPL(security_inode_mkdir); 646 647 int security_inode_rmdir(struct inode *dir, struct dentry *dentry) 648 { 649 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 650 return 0; 651 return call_int_hook(inode_rmdir, 0, dir, dentry); 652 } 653 654 int security_inode_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) 655 { 656 if (unlikely(IS_PRIVATE(dir))) 657 return 0; 658 return call_int_hook(inode_mknod, 0, dir, dentry, mode, dev); 659 } 660 661 int security_inode_rename(struct inode *old_dir, struct dentry *old_dentry, 662 struct inode *new_dir, struct dentry *new_dentry, 663 unsigned int flags) 664 { 665 if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) || 666 (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry))))) 667 return 0; 668 669 if (flags & RENAME_EXCHANGE) { 670 int err = call_int_hook(inode_rename, 0, new_dir, new_dentry, 671 old_dir, old_dentry); 672 if (err) 673 return err; 674 } 675 676 return call_int_hook(inode_rename, 0, old_dir, old_dentry, 677 new_dir, new_dentry); 678 } 679 680 int security_inode_readlink(struct dentry *dentry) 681 { 682 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 683 return 0; 684 return call_int_hook(inode_readlink, 0, dentry); 685 } 686 687 int security_inode_follow_link(struct dentry *dentry, struct inode *inode, 688 bool rcu) 689 { 690 if (unlikely(IS_PRIVATE(inode))) 691 return 0; 692 return call_int_hook(inode_follow_link, 0, dentry, inode, rcu); 693 } 694 695 int security_inode_permission(struct inode *inode, int mask) 696 { 697 if (unlikely(IS_PRIVATE(inode))) 698 return 0; 699 return call_int_hook(inode_permission, 0, inode, mask); 700 } 701 702 int security_inode_setattr(struct dentry *dentry, struct iattr *attr) 703 { 704 int ret; 705 706 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 707 return 0; 708 ret = call_int_hook(inode_setattr, 0, dentry, attr); 709 if (ret) 710 return ret; 711 return evm_inode_setattr(dentry, attr); 712 } 713 EXPORT_SYMBOL_GPL(security_inode_setattr); 714 715 int security_inode_getattr(const struct path *path) 716 { 717 if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry)))) 718 return 0; 719 return call_int_hook(inode_getattr, 0, path); 720 } 721 722 int security_inode_setxattr(struct dentry *dentry, const char *name, 723 const void *value, size_t size, int flags) 724 { 725 int ret; 726 727 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 728 return 0; 729 /* 730 * SELinux and Smack integrate the cap call, 731 * so assume that all LSMs supplying this call do so. 732 */ 733 ret = call_int_hook(inode_setxattr, 1, dentry, name, value, size, 734 flags); 735 736 if (ret == 1) 737 ret = cap_inode_setxattr(dentry, name, value, size, flags); 738 if (ret) 739 return ret; 740 ret = ima_inode_setxattr(dentry, name, value, size); 741 if (ret) 742 return ret; 743 return evm_inode_setxattr(dentry, name, value, size); 744 } 745 746 void security_inode_post_setxattr(struct dentry *dentry, const char *name, 747 const void *value, size_t size, int flags) 748 { 749 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 750 return; 751 call_void_hook(inode_post_setxattr, dentry, name, value, size, flags); 752 evm_inode_post_setxattr(dentry, name, value, size); 753 } 754 755 int security_inode_getxattr(struct dentry *dentry, const char *name) 756 { 757 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 758 return 0; 759 return call_int_hook(inode_getxattr, 0, dentry, name); 760 } 761 762 int security_inode_listxattr(struct dentry *dentry) 763 { 764 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 765 return 0; 766 return call_int_hook(inode_listxattr, 0, dentry); 767 } 768 769 int security_inode_removexattr(struct dentry *dentry, const char *name) 770 { 771 int ret; 772 773 if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) 774 return 0; 775 /* 776 * SELinux and Smack integrate the cap call, 777 * so assume that all LSMs supplying this call do so. 778 */ 779 ret = call_int_hook(inode_removexattr, 1, dentry, name); 780 if (ret == 1) 781 ret = cap_inode_removexattr(dentry, name); 782 if (ret) 783 return ret; 784 ret = ima_inode_removexattr(dentry, name); 785 if (ret) 786 return ret; 787 return evm_inode_removexattr(dentry, name); 788 } 789 790 int security_inode_need_killpriv(struct dentry *dentry) 791 { 792 return call_int_hook(inode_need_killpriv, 0, dentry); 793 } 794 795 int security_inode_killpriv(struct dentry *dentry) 796 { 797 return call_int_hook(inode_killpriv, 0, dentry); 798 } 799 800 int security_inode_getsecurity(struct inode *inode, const char *name, void **buffer, bool alloc) 801 { 802 struct security_hook_list *hp; 803 int rc; 804 805 if (unlikely(IS_PRIVATE(inode))) 806 return -EOPNOTSUPP; 807 /* 808 * Only one module will provide an attribute with a given name. 809 */ 810 hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) { 811 rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc); 812 if (rc != -EOPNOTSUPP) 813 return rc; 814 } 815 return -EOPNOTSUPP; 816 } 817 818 int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags) 819 { 820 struct security_hook_list *hp; 821 int rc; 822 823 if (unlikely(IS_PRIVATE(inode))) 824 return -EOPNOTSUPP; 825 /* 826 * Only one module will provide an attribute with a given name. 827 */ 828 hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) { 829 rc = hp->hook.inode_setsecurity(inode, name, value, size, 830 flags); 831 if (rc != -EOPNOTSUPP) 832 return rc; 833 } 834 return -EOPNOTSUPP; 835 } 836 837 int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size) 838 { 839 if (unlikely(IS_PRIVATE(inode))) 840 return 0; 841 return call_int_hook(inode_listsecurity, 0, inode, buffer, buffer_size); 842 } 843 EXPORT_SYMBOL(security_inode_listsecurity); 844 845 void security_inode_getsecid(struct inode *inode, u32 *secid) 846 { 847 call_void_hook(inode_getsecid, inode, secid); 848 } 849 850 int security_inode_copy_up(struct dentry *src, struct cred **new) 851 { 852 return call_int_hook(inode_copy_up, 0, src, new); 853 } 854 EXPORT_SYMBOL(security_inode_copy_up); 855 856 int security_inode_copy_up_xattr(const char *name) 857 { 858 return call_int_hook(inode_copy_up_xattr, -EOPNOTSUPP, name); 859 } 860 EXPORT_SYMBOL(security_inode_copy_up_xattr); 861 862 int security_file_permission(struct file *file, int mask) 863 { 864 int ret; 865 866 ret = call_int_hook(file_permission, 0, file, mask); 867 if (ret) 868 return ret; 869 870 return fsnotify_perm(file, mask); 871 } 872 873 int security_file_alloc(struct file *file) 874 { 875 return call_int_hook(file_alloc_security, 0, file); 876 } 877 878 void security_file_free(struct file *file) 879 { 880 call_void_hook(file_free_security, file); 881 } 882 883 int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 884 { 885 return call_int_hook(file_ioctl, 0, file, cmd, arg); 886 } 887 888 static inline unsigned long mmap_prot(struct file *file, unsigned long prot) 889 { 890 /* 891 * Does we have PROT_READ and does the application expect 892 * it to imply PROT_EXEC? If not, nothing to talk about... 893 */ 894 if ((prot & (PROT_READ | PROT_EXEC)) != PROT_READ) 895 return prot; 896 if (!(current->personality & READ_IMPLIES_EXEC)) 897 return prot; 898 /* 899 * if that's an anonymous mapping, let it. 900 */ 901 if (!file) 902 return prot | PROT_EXEC; 903 /* 904 * ditto if it's not on noexec mount, except that on !MMU we need 905 * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case 906 */ 907 if (!path_noexec(&file->f_path)) { 908 #ifndef CONFIG_MMU 909 if (file->f_op->mmap_capabilities) { 910 unsigned caps = file->f_op->mmap_capabilities(file); 911 if (!(caps & NOMMU_MAP_EXEC)) 912 return prot; 913 } 914 #endif 915 return prot | PROT_EXEC; 916 } 917 /* anything on noexec mount won't get PROT_EXEC */ 918 return prot; 919 } 920 921 int security_mmap_file(struct file *file, unsigned long prot, 922 unsigned long flags) 923 { 924 int ret; 925 ret = call_int_hook(mmap_file, 0, file, prot, 926 mmap_prot(file, prot), flags); 927 if (ret) 928 return ret; 929 return ima_file_mmap(file, prot); 930 } 931 932 int security_mmap_addr(unsigned long addr) 933 { 934 return call_int_hook(mmap_addr, 0, addr); 935 } 936 937 int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot, 938 unsigned long prot) 939 { 940 return call_int_hook(file_mprotect, 0, vma, reqprot, prot); 941 } 942 943 int security_file_lock(struct file *file, unsigned int cmd) 944 { 945 return call_int_hook(file_lock, 0, file, cmd); 946 } 947 948 int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) 949 { 950 return call_int_hook(file_fcntl, 0, file, cmd, arg); 951 } 952 953 void security_file_set_fowner(struct file *file) 954 { 955 call_void_hook(file_set_fowner, file); 956 } 957 958 int security_file_send_sigiotask(struct task_struct *tsk, 959 struct fown_struct *fown, int sig) 960 { 961 return call_int_hook(file_send_sigiotask, 0, tsk, fown, sig); 962 } 963 964 int security_file_receive(struct file *file) 965 { 966 return call_int_hook(file_receive, 0, file); 967 } 968 969 int security_file_open(struct file *file) 970 { 971 int ret; 972 973 ret = call_int_hook(file_open, 0, file); 974 if (ret) 975 return ret; 976 977 return fsnotify_perm(file, MAY_OPEN); 978 } 979 980 int security_task_alloc(struct task_struct *task, unsigned long clone_flags) 981 { 982 return call_int_hook(task_alloc, 0, task, clone_flags); 983 } 984 985 void security_task_free(struct task_struct *task) 986 { 987 call_void_hook(task_free, task); 988 } 989 990 int security_cred_alloc_blank(struct cred *cred, gfp_t gfp) 991 { 992 return call_int_hook(cred_alloc_blank, 0, cred, gfp); 993 } 994 995 void security_cred_free(struct cred *cred) 996 { 997 call_void_hook(cred_free, cred); 998 } 999 1000 int security_prepare_creds(struct cred *new, const struct cred *old, gfp_t gfp) 1001 { 1002 return call_int_hook(cred_prepare, 0, new, old, gfp); 1003 } 1004 1005 void security_transfer_creds(struct cred *new, const struct cred *old) 1006 { 1007 call_void_hook(cred_transfer, new, old); 1008 } 1009 1010 void security_cred_getsecid(const struct cred *c, u32 *secid) 1011 { 1012 *secid = 0; 1013 call_void_hook(cred_getsecid, c, secid); 1014 } 1015 EXPORT_SYMBOL(security_cred_getsecid); 1016 1017 int security_kernel_act_as(struct cred *new, u32 secid) 1018 { 1019 return call_int_hook(kernel_act_as, 0, new, secid); 1020 } 1021 1022 int security_kernel_create_files_as(struct cred *new, struct inode *inode) 1023 { 1024 return call_int_hook(kernel_create_files_as, 0, new, inode); 1025 } 1026 1027 int security_kernel_module_request(char *kmod_name) 1028 { 1029 int ret; 1030 1031 ret = call_int_hook(kernel_module_request, 0, kmod_name); 1032 if (ret) 1033 return ret; 1034 return integrity_kernel_module_request(kmod_name); 1035 } 1036 1037 int security_kernel_read_file(struct file *file, enum kernel_read_file_id id) 1038 { 1039 int ret; 1040 1041 ret = call_int_hook(kernel_read_file, 0, file, id); 1042 if (ret) 1043 return ret; 1044 return ima_read_file(file, id); 1045 } 1046 EXPORT_SYMBOL_GPL(security_kernel_read_file); 1047 1048 int security_kernel_post_read_file(struct file *file, char *buf, loff_t size, 1049 enum kernel_read_file_id id) 1050 { 1051 int ret; 1052 1053 ret = call_int_hook(kernel_post_read_file, 0, file, buf, size, id); 1054 if (ret) 1055 return ret; 1056 return ima_post_read_file(file, buf, size, id); 1057 } 1058 EXPORT_SYMBOL_GPL(security_kernel_post_read_file); 1059 1060 int security_kernel_load_data(enum kernel_load_data_id id) 1061 { 1062 int ret; 1063 1064 ret = call_int_hook(kernel_load_data, 0, id); 1065 if (ret) 1066 return ret; 1067 return ima_load_data(id); 1068 } 1069 EXPORT_SYMBOL_GPL(security_kernel_load_data); 1070 1071 int security_task_fix_setuid(struct cred *new, const struct cred *old, 1072 int flags) 1073 { 1074 return call_int_hook(task_fix_setuid, 0, new, old, flags); 1075 } 1076 1077 int security_task_setpgid(struct task_struct *p, pid_t pgid) 1078 { 1079 return call_int_hook(task_setpgid, 0, p, pgid); 1080 } 1081 1082 int security_task_getpgid(struct task_struct *p) 1083 { 1084 return call_int_hook(task_getpgid, 0, p); 1085 } 1086 1087 int security_task_getsid(struct task_struct *p) 1088 { 1089 return call_int_hook(task_getsid, 0, p); 1090 } 1091 1092 void security_task_getsecid(struct task_struct *p, u32 *secid) 1093 { 1094 *secid = 0; 1095 call_void_hook(task_getsecid, p, secid); 1096 } 1097 EXPORT_SYMBOL(security_task_getsecid); 1098 1099 int security_task_setnice(struct task_struct *p, int nice) 1100 { 1101 return call_int_hook(task_setnice, 0, p, nice); 1102 } 1103 1104 int security_task_setioprio(struct task_struct *p, int ioprio) 1105 { 1106 return call_int_hook(task_setioprio, 0, p, ioprio); 1107 } 1108 1109 int security_task_getioprio(struct task_struct *p) 1110 { 1111 return call_int_hook(task_getioprio, 0, p); 1112 } 1113 1114 int security_task_prlimit(const struct cred *cred, const struct cred *tcred, 1115 unsigned int flags) 1116 { 1117 return call_int_hook(task_prlimit, 0, cred, tcred, flags); 1118 } 1119 1120 int security_task_setrlimit(struct task_struct *p, unsigned int resource, 1121 struct rlimit *new_rlim) 1122 { 1123 return call_int_hook(task_setrlimit, 0, p, resource, new_rlim); 1124 } 1125 1126 int security_task_setscheduler(struct task_struct *p) 1127 { 1128 return call_int_hook(task_setscheduler, 0, p); 1129 } 1130 1131 int security_task_getscheduler(struct task_struct *p) 1132 { 1133 return call_int_hook(task_getscheduler, 0, p); 1134 } 1135 1136 int security_task_movememory(struct task_struct *p) 1137 { 1138 return call_int_hook(task_movememory, 0, p); 1139 } 1140 1141 int security_task_kill(struct task_struct *p, struct siginfo *info, 1142 int sig, const struct cred *cred) 1143 { 1144 return call_int_hook(task_kill, 0, p, info, sig, cred); 1145 } 1146 1147 int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 1148 unsigned long arg4, unsigned long arg5) 1149 { 1150 int thisrc; 1151 int rc = -ENOSYS; 1152 struct security_hook_list *hp; 1153 1154 hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) { 1155 thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5); 1156 if (thisrc != -ENOSYS) { 1157 rc = thisrc; 1158 if (thisrc != 0) 1159 break; 1160 } 1161 } 1162 return rc; 1163 } 1164 1165 void security_task_to_inode(struct task_struct *p, struct inode *inode) 1166 { 1167 call_void_hook(task_to_inode, p, inode); 1168 } 1169 1170 int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag) 1171 { 1172 return call_int_hook(ipc_permission, 0, ipcp, flag); 1173 } 1174 1175 void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid) 1176 { 1177 *secid = 0; 1178 call_void_hook(ipc_getsecid, ipcp, secid); 1179 } 1180 1181 int security_msg_msg_alloc(struct msg_msg *msg) 1182 { 1183 return call_int_hook(msg_msg_alloc_security, 0, msg); 1184 } 1185 1186 void security_msg_msg_free(struct msg_msg *msg) 1187 { 1188 call_void_hook(msg_msg_free_security, msg); 1189 } 1190 1191 int security_msg_queue_alloc(struct kern_ipc_perm *msq) 1192 { 1193 return call_int_hook(msg_queue_alloc_security, 0, msq); 1194 } 1195 1196 void security_msg_queue_free(struct kern_ipc_perm *msq) 1197 { 1198 call_void_hook(msg_queue_free_security, msq); 1199 } 1200 1201 int security_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg) 1202 { 1203 return call_int_hook(msg_queue_associate, 0, msq, msqflg); 1204 } 1205 1206 int security_msg_queue_msgctl(struct kern_ipc_perm *msq, int cmd) 1207 { 1208 return call_int_hook(msg_queue_msgctl, 0, msq, cmd); 1209 } 1210 1211 int security_msg_queue_msgsnd(struct kern_ipc_perm *msq, 1212 struct msg_msg *msg, int msqflg) 1213 { 1214 return call_int_hook(msg_queue_msgsnd, 0, msq, msg, msqflg); 1215 } 1216 1217 int security_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *msg, 1218 struct task_struct *target, long type, int mode) 1219 { 1220 return call_int_hook(msg_queue_msgrcv, 0, msq, msg, target, type, mode); 1221 } 1222 1223 int security_shm_alloc(struct kern_ipc_perm *shp) 1224 { 1225 return call_int_hook(shm_alloc_security, 0, shp); 1226 } 1227 1228 void security_shm_free(struct kern_ipc_perm *shp) 1229 { 1230 call_void_hook(shm_free_security, shp); 1231 } 1232 1233 int security_shm_associate(struct kern_ipc_perm *shp, int shmflg) 1234 { 1235 return call_int_hook(shm_associate, 0, shp, shmflg); 1236 } 1237 1238 int security_shm_shmctl(struct kern_ipc_perm *shp, int cmd) 1239 { 1240 return call_int_hook(shm_shmctl, 0, shp, cmd); 1241 } 1242 1243 int security_shm_shmat(struct kern_ipc_perm *shp, char __user *shmaddr, int shmflg) 1244 { 1245 return call_int_hook(shm_shmat, 0, shp, shmaddr, shmflg); 1246 } 1247 1248 int security_sem_alloc(struct kern_ipc_perm *sma) 1249 { 1250 return call_int_hook(sem_alloc_security, 0, sma); 1251 } 1252 1253 void security_sem_free(struct kern_ipc_perm *sma) 1254 { 1255 call_void_hook(sem_free_security, sma); 1256 } 1257 1258 int security_sem_associate(struct kern_ipc_perm *sma, int semflg) 1259 { 1260 return call_int_hook(sem_associate, 0, sma, semflg); 1261 } 1262 1263 int security_sem_semctl(struct kern_ipc_perm *sma, int cmd) 1264 { 1265 return call_int_hook(sem_semctl, 0, sma, cmd); 1266 } 1267 1268 int security_sem_semop(struct kern_ipc_perm *sma, struct sembuf *sops, 1269 unsigned nsops, int alter) 1270 { 1271 return call_int_hook(sem_semop, 0, sma, sops, nsops, alter); 1272 } 1273 1274 void security_d_instantiate(struct dentry *dentry, struct inode *inode) 1275 { 1276 if (unlikely(inode && IS_PRIVATE(inode))) 1277 return; 1278 call_void_hook(d_instantiate, dentry, inode); 1279 } 1280 EXPORT_SYMBOL(security_d_instantiate); 1281 1282 int security_getprocattr(struct task_struct *p, char *name, char **value) 1283 { 1284 return call_int_hook(getprocattr, -EINVAL, p, name, value); 1285 } 1286 1287 int security_setprocattr(const char *name, void *value, size_t size) 1288 { 1289 return call_int_hook(setprocattr, -EINVAL, name, value, size); 1290 } 1291 1292 int security_netlink_send(struct sock *sk, struct sk_buff *skb) 1293 { 1294 return call_int_hook(netlink_send, 0, sk, skb); 1295 } 1296 1297 int security_ismaclabel(const char *name) 1298 { 1299 return call_int_hook(ismaclabel, 0, name); 1300 } 1301 EXPORT_SYMBOL(security_ismaclabel); 1302 1303 int security_secid_to_secctx(u32 secid, char **secdata, u32 *seclen) 1304 { 1305 return call_int_hook(secid_to_secctx, -EOPNOTSUPP, secid, secdata, 1306 seclen); 1307 } 1308 EXPORT_SYMBOL(security_secid_to_secctx); 1309 1310 int security_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid) 1311 { 1312 *secid = 0; 1313 return call_int_hook(secctx_to_secid, 0, secdata, seclen, secid); 1314 } 1315 EXPORT_SYMBOL(security_secctx_to_secid); 1316 1317 void security_release_secctx(char *secdata, u32 seclen) 1318 { 1319 call_void_hook(release_secctx, secdata, seclen); 1320 } 1321 EXPORT_SYMBOL(security_release_secctx); 1322 1323 void security_inode_invalidate_secctx(struct inode *inode) 1324 { 1325 call_void_hook(inode_invalidate_secctx, inode); 1326 } 1327 EXPORT_SYMBOL(security_inode_invalidate_secctx); 1328 1329 int security_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen) 1330 { 1331 return call_int_hook(inode_notifysecctx, 0, inode, ctx, ctxlen); 1332 } 1333 EXPORT_SYMBOL(security_inode_notifysecctx); 1334 1335 int security_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen) 1336 { 1337 return call_int_hook(inode_setsecctx, 0, dentry, ctx, ctxlen); 1338 } 1339 EXPORT_SYMBOL(security_inode_setsecctx); 1340 1341 int security_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen) 1342 { 1343 return call_int_hook(inode_getsecctx, -EOPNOTSUPP, inode, ctx, ctxlen); 1344 } 1345 EXPORT_SYMBOL(security_inode_getsecctx); 1346 1347 #ifdef CONFIG_SECURITY_NETWORK 1348 1349 int security_unix_stream_connect(struct sock *sock, struct sock *other, struct sock *newsk) 1350 { 1351 return call_int_hook(unix_stream_connect, 0, sock, other, newsk); 1352 } 1353 EXPORT_SYMBOL(security_unix_stream_connect); 1354 1355 int security_unix_may_send(struct socket *sock, struct socket *other) 1356 { 1357 return call_int_hook(unix_may_send, 0, sock, other); 1358 } 1359 EXPORT_SYMBOL(security_unix_may_send); 1360 1361 int security_socket_create(int family, int type, int protocol, int kern) 1362 { 1363 return call_int_hook(socket_create, 0, family, type, protocol, kern); 1364 } 1365 1366 int security_socket_post_create(struct socket *sock, int family, 1367 int type, int protocol, int kern) 1368 { 1369 return call_int_hook(socket_post_create, 0, sock, family, type, 1370 protocol, kern); 1371 } 1372 1373 int security_socket_socketpair(struct socket *socka, struct socket *sockb) 1374 { 1375 return call_int_hook(socket_socketpair, 0, socka, sockb); 1376 } 1377 EXPORT_SYMBOL(security_socket_socketpair); 1378 1379 int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen) 1380 { 1381 return call_int_hook(socket_bind, 0, sock, address, addrlen); 1382 } 1383 1384 int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen) 1385 { 1386 return call_int_hook(socket_connect, 0, sock, address, addrlen); 1387 } 1388 1389 int security_socket_listen(struct socket *sock, int backlog) 1390 { 1391 return call_int_hook(socket_listen, 0, sock, backlog); 1392 } 1393 1394 int security_socket_accept(struct socket *sock, struct socket *newsock) 1395 { 1396 return call_int_hook(socket_accept, 0, sock, newsock); 1397 } 1398 1399 int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size) 1400 { 1401 return call_int_hook(socket_sendmsg, 0, sock, msg, size); 1402 } 1403 1404 int security_socket_recvmsg(struct socket *sock, struct msghdr *msg, 1405 int size, int flags) 1406 { 1407 return call_int_hook(socket_recvmsg, 0, sock, msg, size, flags); 1408 } 1409 1410 int security_socket_getsockname(struct socket *sock) 1411 { 1412 return call_int_hook(socket_getsockname, 0, sock); 1413 } 1414 1415 int security_socket_getpeername(struct socket *sock) 1416 { 1417 return call_int_hook(socket_getpeername, 0, sock); 1418 } 1419 1420 int security_socket_getsockopt(struct socket *sock, int level, int optname) 1421 { 1422 return call_int_hook(socket_getsockopt, 0, sock, level, optname); 1423 } 1424 1425 int security_socket_setsockopt(struct socket *sock, int level, int optname) 1426 { 1427 return call_int_hook(socket_setsockopt, 0, sock, level, optname); 1428 } 1429 1430 int security_socket_shutdown(struct socket *sock, int how) 1431 { 1432 return call_int_hook(socket_shutdown, 0, sock, how); 1433 } 1434 1435 int security_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) 1436 { 1437 return call_int_hook(socket_sock_rcv_skb, 0, sk, skb); 1438 } 1439 EXPORT_SYMBOL(security_sock_rcv_skb); 1440 1441 int security_socket_getpeersec_stream(struct socket *sock, char __user *optval, 1442 int __user *optlen, unsigned len) 1443 { 1444 return call_int_hook(socket_getpeersec_stream, -ENOPROTOOPT, sock, 1445 optval, optlen, len); 1446 } 1447 1448 int security_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *skb, u32 *secid) 1449 { 1450 return call_int_hook(socket_getpeersec_dgram, -ENOPROTOOPT, sock, 1451 skb, secid); 1452 } 1453 EXPORT_SYMBOL(security_socket_getpeersec_dgram); 1454 1455 int security_sk_alloc(struct sock *sk, int family, gfp_t priority) 1456 { 1457 return call_int_hook(sk_alloc_security, 0, sk, family, priority); 1458 } 1459 1460 void security_sk_free(struct sock *sk) 1461 { 1462 call_void_hook(sk_free_security, sk); 1463 } 1464 1465 void security_sk_clone(const struct sock *sk, struct sock *newsk) 1466 { 1467 call_void_hook(sk_clone_security, sk, newsk); 1468 } 1469 EXPORT_SYMBOL(security_sk_clone); 1470 1471 void security_sk_classify_flow(struct sock *sk, struct flowi *fl) 1472 { 1473 call_void_hook(sk_getsecid, sk, &fl->flowi_secid); 1474 } 1475 EXPORT_SYMBOL(security_sk_classify_flow); 1476 1477 void security_req_classify_flow(const struct request_sock *req, struct flowi *fl) 1478 { 1479 call_void_hook(req_classify_flow, req, fl); 1480 } 1481 EXPORT_SYMBOL(security_req_classify_flow); 1482 1483 void security_sock_graft(struct sock *sk, struct socket *parent) 1484 { 1485 call_void_hook(sock_graft, sk, parent); 1486 } 1487 EXPORT_SYMBOL(security_sock_graft); 1488 1489 int security_inet_conn_request(struct sock *sk, 1490 struct sk_buff *skb, struct request_sock *req) 1491 { 1492 return call_int_hook(inet_conn_request, 0, sk, skb, req); 1493 } 1494 EXPORT_SYMBOL(security_inet_conn_request); 1495 1496 void security_inet_csk_clone(struct sock *newsk, 1497 const struct request_sock *req) 1498 { 1499 call_void_hook(inet_csk_clone, newsk, req); 1500 } 1501 1502 void security_inet_conn_established(struct sock *sk, 1503 struct sk_buff *skb) 1504 { 1505 call_void_hook(inet_conn_established, sk, skb); 1506 } 1507 EXPORT_SYMBOL(security_inet_conn_established); 1508 1509 int security_secmark_relabel_packet(u32 secid) 1510 { 1511 return call_int_hook(secmark_relabel_packet, 0, secid); 1512 } 1513 EXPORT_SYMBOL(security_secmark_relabel_packet); 1514 1515 void security_secmark_refcount_inc(void) 1516 { 1517 call_void_hook(secmark_refcount_inc); 1518 } 1519 EXPORT_SYMBOL(security_secmark_refcount_inc); 1520 1521 void security_secmark_refcount_dec(void) 1522 { 1523 call_void_hook(secmark_refcount_dec); 1524 } 1525 EXPORT_SYMBOL(security_secmark_refcount_dec); 1526 1527 int security_tun_dev_alloc_security(void **security) 1528 { 1529 return call_int_hook(tun_dev_alloc_security, 0, security); 1530 } 1531 EXPORT_SYMBOL(security_tun_dev_alloc_security); 1532 1533 void security_tun_dev_free_security(void *security) 1534 { 1535 call_void_hook(tun_dev_free_security, security); 1536 } 1537 EXPORT_SYMBOL(security_tun_dev_free_security); 1538 1539 int security_tun_dev_create(void) 1540 { 1541 return call_int_hook(tun_dev_create, 0); 1542 } 1543 EXPORT_SYMBOL(security_tun_dev_create); 1544 1545 int security_tun_dev_attach_queue(void *security) 1546 { 1547 return call_int_hook(tun_dev_attach_queue, 0, security); 1548 } 1549 EXPORT_SYMBOL(security_tun_dev_attach_queue); 1550 1551 int security_tun_dev_attach(struct sock *sk, void *security) 1552 { 1553 return call_int_hook(tun_dev_attach, 0, sk, security); 1554 } 1555 EXPORT_SYMBOL(security_tun_dev_attach); 1556 1557 int security_tun_dev_open(void *security) 1558 { 1559 return call_int_hook(tun_dev_open, 0, security); 1560 } 1561 EXPORT_SYMBOL(security_tun_dev_open); 1562 1563 int security_sctp_assoc_request(struct sctp_endpoint *ep, struct sk_buff *skb) 1564 { 1565 return call_int_hook(sctp_assoc_request, 0, ep, skb); 1566 } 1567 EXPORT_SYMBOL(security_sctp_assoc_request); 1568 1569 int security_sctp_bind_connect(struct sock *sk, int optname, 1570 struct sockaddr *address, int addrlen) 1571 { 1572 return call_int_hook(sctp_bind_connect, 0, sk, optname, 1573 address, addrlen); 1574 } 1575 EXPORT_SYMBOL(security_sctp_bind_connect); 1576 1577 void security_sctp_sk_clone(struct sctp_endpoint *ep, struct sock *sk, 1578 struct sock *newsk) 1579 { 1580 call_void_hook(sctp_sk_clone, ep, sk, newsk); 1581 } 1582 EXPORT_SYMBOL(security_sctp_sk_clone); 1583 1584 #endif /* CONFIG_SECURITY_NETWORK */ 1585 1586 #ifdef CONFIG_SECURITY_INFINIBAND 1587 1588 int security_ib_pkey_access(void *sec, u64 subnet_prefix, u16 pkey) 1589 { 1590 return call_int_hook(ib_pkey_access, 0, sec, subnet_prefix, pkey); 1591 } 1592 EXPORT_SYMBOL(security_ib_pkey_access); 1593 1594 int security_ib_endport_manage_subnet(void *sec, const char *dev_name, u8 port_num) 1595 { 1596 return call_int_hook(ib_endport_manage_subnet, 0, sec, dev_name, port_num); 1597 } 1598 EXPORT_SYMBOL(security_ib_endport_manage_subnet); 1599 1600 int security_ib_alloc_security(void **sec) 1601 { 1602 return call_int_hook(ib_alloc_security, 0, sec); 1603 } 1604 EXPORT_SYMBOL(security_ib_alloc_security); 1605 1606 void security_ib_free_security(void *sec) 1607 { 1608 call_void_hook(ib_free_security, sec); 1609 } 1610 EXPORT_SYMBOL(security_ib_free_security); 1611 #endif /* CONFIG_SECURITY_INFINIBAND */ 1612 1613 #ifdef CONFIG_SECURITY_NETWORK_XFRM 1614 1615 int security_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp, 1616 struct xfrm_user_sec_ctx *sec_ctx, 1617 gfp_t gfp) 1618 { 1619 return call_int_hook(xfrm_policy_alloc_security, 0, ctxp, sec_ctx, gfp); 1620 } 1621 EXPORT_SYMBOL(security_xfrm_policy_alloc); 1622 1623 int security_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx, 1624 struct xfrm_sec_ctx **new_ctxp) 1625 { 1626 return call_int_hook(xfrm_policy_clone_security, 0, old_ctx, new_ctxp); 1627 } 1628 1629 void security_xfrm_policy_free(struct xfrm_sec_ctx *ctx) 1630 { 1631 call_void_hook(xfrm_policy_free_security, ctx); 1632 } 1633 EXPORT_SYMBOL(security_xfrm_policy_free); 1634 1635 int security_xfrm_policy_delete(struct xfrm_sec_ctx *ctx) 1636 { 1637 return call_int_hook(xfrm_policy_delete_security, 0, ctx); 1638 } 1639 1640 int security_xfrm_state_alloc(struct xfrm_state *x, 1641 struct xfrm_user_sec_ctx *sec_ctx) 1642 { 1643 return call_int_hook(xfrm_state_alloc, 0, x, sec_ctx); 1644 } 1645 EXPORT_SYMBOL(security_xfrm_state_alloc); 1646 1647 int security_xfrm_state_alloc_acquire(struct xfrm_state *x, 1648 struct xfrm_sec_ctx *polsec, u32 secid) 1649 { 1650 return call_int_hook(xfrm_state_alloc_acquire, 0, x, polsec, secid); 1651 } 1652 1653 int security_xfrm_state_delete(struct xfrm_state *x) 1654 { 1655 return call_int_hook(xfrm_state_delete_security, 0, x); 1656 } 1657 EXPORT_SYMBOL(security_xfrm_state_delete); 1658 1659 void security_xfrm_state_free(struct xfrm_state *x) 1660 { 1661 call_void_hook(xfrm_state_free_security, x); 1662 } 1663 1664 int security_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir) 1665 { 1666 return call_int_hook(xfrm_policy_lookup, 0, ctx, fl_secid, dir); 1667 } 1668 1669 int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 1670 struct xfrm_policy *xp, 1671 const struct flowi *fl) 1672 { 1673 struct security_hook_list *hp; 1674 int rc = 1; 1675 1676 /* 1677 * Since this function is expected to return 0 or 1, the judgment 1678 * becomes difficult if multiple LSMs supply this call. Fortunately, 1679 * we can use the first LSM's judgment because currently only SELinux 1680 * supplies this call. 1681 * 1682 * For speed optimization, we explicitly break the loop rather than 1683 * using the macro 1684 */ 1685 hlist_for_each_entry(hp, &security_hook_heads.xfrm_state_pol_flow_match, 1686 list) { 1687 rc = hp->hook.xfrm_state_pol_flow_match(x, xp, fl); 1688 break; 1689 } 1690 return rc; 1691 } 1692 1693 int security_xfrm_decode_session(struct sk_buff *skb, u32 *secid) 1694 { 1695 return call_int_hook(xfrm_decode_session, 0, skb, secid, 1); 1696 } 1697 1698 void security_skb_classify_flow(struct sk_buff *skb, struct flowi *fl) 1699 { 1700 int rc = call_int_hook(xfrm_decode_session, 0, skb, &fl->flowi_secid, 1701 0); 1702 1703 BUG_ON(rc); 1704 } 1705 EXPORT_SYMBOL(security_skb_classify_flow); 1706 1707 #endif /* CONFIG_SECURITY_NETWORK_XFRM */ 1708 1709 #ifdef CONFIG_KEYS 1710 1711 int security_key_alloc(struct key *key, const struct cred *cred, 1712 unsigned long flags) 1713 { 1714 return call_int_hook(key_alloc, 0, key, cred, flags); 1715 } 1716 1717 void security_key_free(struct key *key) 1718 { 1719 call_void_hook(key_free, key); 1720 } 1721 1722 int security_key_permission(key_ref_t key_ref, 1723 const struct cred *cred, unsigned perm) 1724 { 1725 return call_int_hook(key_permission, 0, key_ref, cred, perm); 1726 } 1727 1728 int security_key_getsecurity(struct key *key, char **_buffer) 1729 { 1730 *_buffer = NULL; 1731 return call_int_hook(key_getsecurity, 0, key, _buffer); 1732 } 1733 1734 #endif /* CONFIG_KEYS */ 1735 1736 #ifdef CONFIG_AUDIT 1737 1738 int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule) 1739 { 1740 return call_int_hook(audit_rule_init, 0, field, op, rulestr, lsmrule); 1741 } 1742 1743 int security_audit_rule_known(struct audit_krule *krule) 1744 { 1745 return call_int_hook(audit_rule_known, 0, krule); 1746 } 1747 1748 void security_audit_rule_free(void *lsmrule) 1749 { 1750 call_void_hook(audit_rule_free, lsmrule); 1751 } 1752 1753 int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, 1754 struct audit_context *actx) 1755 { 1756 return call_int_hook(audit_rule_match, 0, secid, field, op, lsmrule, 1757 actx); 1758 } 1759 #endif /* CONFIG_AUDIT */ 1760 1761 #ifdef CONFIG_BPF_SYSCALL 1762 int security_bpf(int cmd, union bpf_attr *attr, unsigned int size) 1763 { 1764 return call_int_hook(bpf, 0, cmd, attr, size); 1765 } 1766 int security_bpf_map(struct bpf_map *map, fmode_t fmode) 1767 { 1768 return call_int_hook(bpf_map, 0, map, fmode); 1769 } 1770 int security_bpf_prog(struct bpf_prog *prog) 1771 { 1772 return call_int_hook(bpf_prog, 0, prog); 1773 } 1774 int security_bpf_map_alloc(struct bpf_map *map) 1775 { 1776 return call_int_hook(bpf_map_alloc_security, 0, map); 1777 } 1778 int security_bpf_prog_alloc(struct bpf_prog_aux *aux) 1779 { 1780 return call_int_hook(bpf_prog_alloc_security, 0, aux); 1781 } 1782 void security_bpf_map_free(struct bpf_map *map) 1783 { 1784 call_void_hook(bpf_map_free_security, map); 1785 } 1786 void security_bpf_prog_free(struct bpf_prog_aux *aux) 1787 { 1788 call_void_hook(bpf_prog_free_security, aux); 1789 } 1790 #endif /* CONFIG_BPF_SYSCALL */ 1791